Drill rig



F. D. ELFORD May 4, I948.

DRILL RIG Filed Fe 13, 1945 ix 3mm f'ra/r/r 17. E/fard Patented May 4,1948 anussz Frank Douglas Elforcl,

Victoria, British Columbia, Ganad Application February 13, 1945, SerialNo. stress L 3 Claims.

the beams with a minimum of effort and exertion req ired. t

More specifically, the invention embodies the provision of a rail fromwhich the drill is suspended and slidably mountedthereon together withmeans for pressing the drillagainst a beam in which the holes are to bedrilled and including a lever pivoted to the rail and connected to thehandle of the drill forvmoving the drill forwardly during the drillingoperation.

A further object of the invention is to provide a drilling rig of thischaracter of simple and practical construction, which isstrong anddurable, which may be easily and quickly attached to a conventional formof electric drill and which otherwise is well adapted for the purposesfor which the same is intended.

Other objects and advantages reside in the de tails of construction andoperation as more fully hereinafter described and claimed, referencebeing had to the accompanying drawings forming part hereof, wherein likenumerals refer to like parts throughout, and in which:

Figure -1 is a side elevationalview.

Figure 2 is a sectional view taken substantially on a line 22 of Figure1.

Figure 3 is a sectional view taken substantially on a line 33 of Figure2.

Figure 4 is a fragmentary end elevational view of the up er end of thelever.

Figure 5 is a side elevational View thereof.

Figure 6 is an end elevational View of the clip adapted for attachingthe handle of the drill to the supporting rail and with the linkconnecting the lever with the clip shown in section.

Figure '7 is a side elevational view thereof.

Figure 8 is an end elevational View of the clip slidably supporting thedrill on the rail.

Figure 9 is a top plan view of the link connecting the lever with theclip for the handle of the drill, and

Figure 10 is a side elevational view thereof.

Referring now to the drawings in detail wherein for the purpose ofillustration I have 2 A A disclosed a preferred embodiment of theinvention, the numeral 5 designates a rail of rectangular shape incross-section and on which an inverted substantially U-shaped clip 6 isslidably mounted, the legs of the clip having screws 1 freely insertedtherethrough forthreaded engagement with the opposite sidesof the handle8 of a portable electric drill 9.

The clip 6 slidably supports the drill on the rail 5 and the centralportion of the clip is offset as indicated at It to provide a recess IIin its underside to snugly receive the edges of the .rail 5 duringsliding movement of theclip and. to prevent lateral play of the drill ontherail.

A second clip l2 of substantially inverted U- shaped formation has itsupper portion formed with a substantially T-head l3 in which the rail 5is slidably received, the legs of the clip l2 extending downwardlybehind the handlel8 and have arms I4 welded or otherwise suitably s6cured to the legs and projecting forwardly at opposite side of thehandle .8 and provided with openings l5 adapted forselectivelyfreceiving bolts or. screws I6 for, attaching the front endsof the arms to the handle. A l

' A lever ll has its upper end pivoted between the legs 18 of asubstantially U-shaped clip I9 by means of a pin 20, the cliplBbeingslidably mounted on the rail 5 and secured in longitudinallyadjusted position thereon by means of a setscrewZl, A A A A link 22 hasits rear end pivoted to the upper portion of the lever by means of a pin23 and extends forwardly for pivotalconnection between bar havinglongitudinally spaced notches 29 in its lower edge adapted for engaginga lug 30 formed in the bottom of the bracket 21.

A plunger 3| is slidably mounted in the top of 3 34 at its front end,the hook being adapted to engage a beam 35 extending downwardly from adeck head or similar structure 36.

By adjusting the rack bar with the hook 34 of the rack bar in clampingengagement with the beam 35 the drill 9 will be supported in a positionfor drilling holes in the beam 35, a forward pressure being exerted onth drill. by a. rearward movement of. the lower end of: the lever ll.

Where the decking 36 is formed with additional beams such as indicatedat 31, sufiiciently.

close to the beam 35 to permit the rear end of end of the lever movesthe drill on the rail, a rack bar having a, hook on one end adapted toextend the rail 5 to abut the beam 31, the rack bar 28 and hook 34 arenot required and may be re-.

moved and by loosening the set screw 21' the rear end of the rail 5 maybe slid outward in abutting engagement with a beam 31 and inv operation.

the drill slides forwardly on the rail bvmeans. of the sliding clips 6and I2. The pin engaging the rear edge of the; handle 8 of the drillprevents pivotal'movemenir of the drill on the screws drillingoperation;

The rai15 maybe easiiy removed from-theclip 6, l2 and. 19 by releasingtheset screw 2!- and the clips Gand', ITmay-a-lsobe quickly detachedfrom thehandle B of the drill for-interchangeable sew h Qther r l's; whedesired;

It is believed that the details of construction, manner of operationand? advantages of the device will be readily understood from theforegoing without further detailedexplanation. Having. thus describedthe invention, what I claim is:

1, In an attachment for'an' electric drill1 having a. motor 19 15315;driilaholding chuck and a and. r m x ombinatio i hic m ses alongitudinally, extending rail positioned parallel the. axis.ofiaididril ehold ne huck a li li ably attafi ng the rail to the h l sing'through the handle thereof, a depending lever suspended from. saidrail,a clip pivotally andadjustably mounting thel'ever onthe, rail, anotherclip attachedto the handgrip ofthehousing having a socket, in the. upperend slidabie' over th rail, and a link, pivotally, connecting the leverto the clip on the hand grip wherein forward movement of the lower. endof thelever moves the drillon therailr 2.. In an. attachment for; anelectric drill having; a motor, housing, adrilL-holding chuck and a handgrip, the, combination which comprises a beyond the end of the drillwith the rack bar extending, through a, socket in the lever, saidrack-bar having'notches therein, and a spring pin urging said rack bartoward a p jection in the. ,socketlot'the lever to hold the bar with oneof thenotches thereof on said projection.

3. In an attachmentfor an electric drill having a motor housing, adrill-holding chuck, and ahand grip, .thelcombinationwhich: comprises ahorizontally. extending rail positioned: parallel to the axis. of said'drilli-holding: chuck, a cl ipislidably attaching the rail to thehousing; through the handle thereof, a depending lever-suspended fromsaid. rail positioned: beyond one end ofthe housing and aligned;therewith, means-pivotally andi adj'ustahly the upper endof? the leveronthe rail;:a-.socket fixedly moun'ted on; the hand grip-of thehousingthmugh which the rail extends, a linltf-pivotallgrconnectingthe=leven to the: socket: wherein movem'enitofithe lower: end of thelever slides the drill and motor housing along the rail,-. a rack; barhaving a hook on one end adapted to.- ext'en'dl beyond the: end of. the?drill withthe rack bar extending through: a socket in' thalever; saidrackrbar havingi notches therefin, a,nd a. spring'pina positioned 'inthesocket in the lever urging-said rack' bari r ward; a ppoj'egtion in: thesocket of "the lever to hold? the bar with one of the notchesgtherein inregistering relation'witltsaidiproictlonl u FRiA-NKZ' DQUGEAS Thefollowin refe enced are o necordi in; the l ofg hiamtenti.

STATES, retains Number Name gate van lifusen t al'i Dee-211 1837 975,031Greene..."e e N v 85,1910

